7... e8g8 Because the pawn remains on d7, Black has better chances if we compare the position with a normal Dragon. 8. c4b3  8... f8e8 A somewhat \"mysterious rook move\" as Nimzowitsch phrased a long time ago, but this is well known to opening theory. The rook can be useful to support a plan with e6-d5 or even d5 immediately. 9. e1g1  9... d7d6 Threatening ...Ng4.